Between 1957 and 1961,many pregnant women took thalidomide to alleviate morning sickness;this drug disrupted a(n) _____ period of prenatal development.

A) sensitive
B) critical
C) early
D) late

Critical Period

A specific timeframe in the development of an organism when it is particularly sensitive to certain environmental stimuli, which can have a long-lasting effect on its future behavior and abilities.

Thalidomide

A drug that caused birth defects when given to pregnant women in the 1950s and 1960s, now used under strict controls for some diseases.

Prenatal Development

The developmental journey within the womb starting at conception and culminating in birth.